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Bug#546262: kdm crash (due to a bug in libx11-6 o xserver in unstable?)

Yes, it is a reproducible crash. For some strange reason it happens
not the first time you log in using kdm, but when you close your
session and log in again (after answering your username and password)

I know that I'm using an unsupported combination (for several reasons
I'm not planning to upgrade to KDE 4 for the moment, therefore I've
downgraded my X to stable, but I've build a Debian system in a chroot
in order to reproduce the bug) , but as Julien says that doesn't mean
that the bug needs not to be investigated, because it may reveal some
hidden bug in the new version of X  in unstable.

I think that the X implementation should reliably run all the programs
that use the standard X libraries in the expected way (and I believe
that  kdm 3.5.x is one of them), even if they are not included in

I will rebuild libx11 without optimisation as requested and send you a
full backtrace.

Many thanks. Cheers,

On Sat, Sep 12, 2009 at 7:05 AM, Julien Cristau <jcristau@debian.org> wrote:
> reopen 546262
> kthxbye
> On Sat, Sep 12, 2009 at 12:34:07 +0300, George Kiagiadakis wrote:
>> 2009/9/12 Pablo De Napoli <pdenapo@gmail.com>:
>> > I want to report a bug that makes kdm crash, though I believe that the bug
>> > is not caused by kdm itself but probably by the xserver in unstable (that
>> > have changed the way of handling input devices, in particular the keyboard).
>> > [with the xserver-xorg in lenny (version 1.7.20) things work fine, with
>> > the version in unstable (1.7.4+4) kdm crashes.
>> Hi,
>> You are using an unsupported combination of packages (KDE 3 from lenny
>> and X 7.4 from unstable). KDE 3 is dead upstream and it is not going
>> to be fixed to support newer versions of libraries and other
>> components of the system, such as X. Since kdm from lenny works fine
>> with X from lenny, this is not a bug that concerns us. To solve this
>> problem, either downgrade X to the version from lenny or upgrade to
>> KDE 4. If the problem persists with KDE 4.3.1 that is now available in
>> testing and unstable, please reopen this bug.
> WTF.  If kdm crashes reproducibly then this should be investigated, and
> fixed if it's a bug in the X libraries or server.  Newer X libs (or
> newer X server) shouldn't break older software.  Only if it's a kdm bug
> fixed in sid does it sort of make sense to close this.
> Pablo, can you rebuild libx11 without optimisation and send a full
> backtrace?
> Line 320 of src/xkb/XKBBind.c is:
>                    preserve= type->preserve[i].mask;
> so knowing what *type looks like would be nice.
> Cheers,
> Julien

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